Figure out how to handle subprompts

[bbatsov]

When you pass a multi-line command to the REPL the output gets littered with #_> subprompts. Some possible ways to handle this include converting all REPL input to a single line before sending it to the REPL or adding to code to filter out the REPL subprompts.

[otijhuis]

I've been doing it like this:

(defcustom inf-clojure-subprompt " *#_=> *"
  "Regexp to recognize subprompts in the Inferior Clojure mode."
  :type 'regexp
  :group 'inf-clojure)

(defun inf-clojure-remove-subprompts (txt)
  (replace-regexp-in-string inf-clojure-subprompt "" txt))

(add-hook 'comint-preoutput-filter-functions #'inf-clojure-remove-subprompts)

Seems to work very well. Haven't had any problems with it.

I tried converting multi-line strings to a single line by removing the newlines but then expressions like below will end up being evaluated incorrectly.

(def some-string "this
 is
 a
 multi-line
 string")

[bbatsov]

Looks reasonable. Guess you can convert this to a PR. :-)

[otijhuis]

Damn, you're fast :)

I'll create a PR as soon as I can. Have to head out for a while.

[otijhuis]

Do you want to me to keep it as a separate filter or add it to the current filter?

(defun inf-clojure-preoutput-filter (str)
  "Preprocess the output STR from interactive commands."
  (cond
   ((string-prefix-p "inf-clojure-" (symbol-name (or this-command last-command)))
    ;; prepend a newline to the output string
    (inf-clojure-chomp (concat "\n" str)))
   (t str)))

[bbatsov]

Using the same filter is fine.